<template>
  <div style="padding: 10px">
    <!-- 功能区域 -->
    <div style="margin: 10px 0">
      <el-button type="primary" @click="add">
        新增
      </el-button>
      <el-popconfirm
          v-if="user.role === 1"
          title="确定删除吗？"
          @confirm="deleteBatch"
      >
        <template #reference>
          <el-button type="danger">批量删除</el-button>
        </template>
      </el-popconfirm>
    </div>

    <!-- 搜索区域 -->
    <div style="margin: 10px 0">
      <el-input
          v-model="queryParams.search"
          placeholder="请输入关键字"
          style="width: 20%"
          clearable
      ></el-input>
      <el-button type="primary" style="margin-left: 5px" @click="load">
        查询
      </el-button>
    </div>
    <el-table
        v-loading="loading"
        :data="tableData"
        style="width: 100%"
        border
        stripe
        @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="ID" sortable></el-table-column>
      <el-table-column prop="name" label="名称"></el-table-column>
      <el-table-column prop="price" label="单价"></el-table-column>
      <el-table-column prop="count" label="库存数量"></el-table-column>
      <el-table-column prop="author" label="作者"></el-table-column>
      <el-table-column
          prop="createTime"
          label="出版时间"
          sortable
      ></el-table-column>
      <el-table-column label="封面">
        <template #default="scope">
          <el-image
              style="width: 100px; height: 100px"
              :src="scope.row.cover"
              :preview-src-list="[scope.row.cover]"
          >
            <template #error>
              <div
                  class="image-slot"
                  style="
                  text-align: center;
                  line-height: 99px;
                  border: 1px solid #ccc;
                "
              >
                <i class="el-icon-picture-outline"></i>
              </div>
            </template>
          </el-image>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="260">
        <template #default="scope">
          <el-button type="primary" size="mini" @click="buy(scope.row.id)">
            购买
          </el-button>
          <el-button
              size="mini"
              @click="handleEdit(scope.row)"
              v-if="user.role === 1 || user.id === scope.row.id"
          >
            编辑
          </el-button>
          <el-popconfirm
              v-if="user.role === 1 || user.id === scope.row.id"
              title="确定删除吗？"
              @confirm="handleDelete(scope.row.id)"
          >
            <template #reference>
              <el-button size="mini" type="danger">删除</el-button>
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <div style="margin: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryParams.pageNum"
          :page-size="queryParams.pageSize"
          :page-sizes="[5, 10, 20]"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total"
      >
      </el-pagination>
    </div>

    <!-- 添加修改框 -->
    <el-dialog
        title="提示"
        v-model="dialogVisible"
        width="30%"
        @close="closeDialog"
    >
      <el-form ref="form" :model="form" label-width="30%" :rules="rules">
        <el-form-item label="名称" prop="name">
          <el-input v-model="form.name" style="width: 80%"></el-input>
        </el-form-item>
        <el-form-item label="价格" prop="price">
          <el-input v-model="form.price" style="width: 80%"></el-input>
        </el-form-item>
        <el-form-item label="库存数量" prop="count">
          <el-input v-model="form.count" style="width: 80%"></el-input>
        </el-form-item>
        <el-form-item label="作者" prop="author">
          <el-input v-model="form.author" style="width: 80%"></el-input>
        </el-form-item>
        <el-form-item label="出版时间" prop="createTime">
          <el-date-picker
              v-model="form.createTime"
              type="date"
              value-format="YYYY-MM-DD"
              style="width: 80%"
              clearable
          ></el-date-picker>
        </el-form-item>
        <el-form-item label="所属用户" prop="userId">
          <el-select v-model="form.userId" filterable placeholder="请选择">
            <el-option
                v-for="u in users"
                :key="u.id"
                :label="u.username"
                :value="u.id"
            >
            </el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="封面" prop="cover">
          <el-upload
              ref="upload"
              :show-file-list="false"
              :limit="1"
              :action="filesUploadUrl"
              :on-success="filesUploadSuccess"
              v-model="form.cover"
          >
            <el-button type="primary">点击上传</el-button>
          </el-upload>
          <el-image
              v-if="
              form.cover !== undefined &&
              form.cover !== null &&
              form.cover !== ''
            "
              style="width: 100px; height: 100px; margin-top: 20px"
              :src="form.cover"
              :preview-src-list="[form.cover]"
          ></el-image>
        </el-form-item>
      </el-form>
      <template #footer>
        <span class="dialog-footer">
          <el-button @click="dialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="save">确 定</el-button>
        </span>
      </template>
    </el-dialog>

    <!-- 假支付界面 -->
    <el-dialog title="支付界面" v-model="payDialogVisible" width="30%">
      <el-form :model="payForm" label-width="30%">
        <el-form-item label="书名">
          <el-input
              disabled
              v-model="payForm.name"
              style="width: 80%"
          ></el-input>
        </el-form-item>
        <el-form-item label="书价(￥)">
          <el-input
              disabled
              v-model="payForm.book.price"
              style="width: 80%"
          ></el-input>
        </el-form-item>
        <el-form-item label="您的余额(￥)">
          <el-input
              disabled
              v-model="user.account"
              style="width: 80%"
          ></el-input>
        </el-form-item>
        <el-form-item label="购买数量">
          <el-input
              v-model="payForm.count"
              style="width: 80%"
              @input="calculateTotalPrice"
          >
          </el-input>
        </el-form-item>
        <el-form-item label="总价(￥)">
          <el-input
              disabled
              v-model="payForm.totalPrice"
              style="width: 80%"
          ></el-input>
        </el-form-item>
      </el-form>
      <template #footer>
        <span class="dialog-footer">
          <el-button @click="payDialogVisible = false">取消购买</el-button>
          <el-button type="primary" @click="buySuccess">确认购买</el-button>
        </span>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import request from "@/utils/request";

export default {
  name: "Book",
  components: {},
  data() {
    return {
      user: {},
      users: {},
      payForm: {},
      queryParams: {
        search: "",
        pageNum: 1,
        pageSize: 10,
      },
      total: 0,
      loading: true,
      dialogVisible: false,
      payDialogVisible: false,
      form: {},
      deleteBatchParams: {
        ids: [],
      },
      filesUploadUrl:
          "http://" + window.server.filesUploadUrl + ":9090/files/upload",
      rules: {
        name: [{required: true, message: "请输入名称", trigger: "blur"}],
        price: [{required: true, message: "请输入价格", trigger: "blur"}],
        count: [{required: true, message: "请输入库存数量", trigger: "blur"}],
        author: [{required: true, message: "请输入作者", trigger: "blur"}],
        createTime: [
          {required: true, message: "请选择出版时间", trigger: "blur"},
        ],
        userId: [
          {required: true, message: "请选择所属用户", trigger: "change"},
        ],
        cover: [{required: true, message: "请上传封面", trigger: "change"}],
      },
    };
  },
  created() {
    let userStr = localStorage.getItem("user") || "{}";
    this.user = JSON.parse(userStr);
    // 请求服务端，确认当前登录用户的 合法信息
    request.get("/user/" + this.user.id).then((res) => {
      if (res.code === "0") {
        this.user = res.data;
      }
    });

    this.load();
  },
  methods: {
    load() {
      this.loading = true;
      request.post("/book/query", this.queryParams).then((res) => {
        this.loading = false;
        this.tableData = res.data.records;
        this.total = res.data.total;
      });
    },
    add() {
      this.dialogVisible = true;
      // 查询所有用户
      request.get("/user/findAll").then((res) => {
        this.users = res.data;
      });
    },
    save() {
      this.$refs["form"].validate((valid) => {
        if (valid) {
          if (this.form.id) {
            // 更新
            request.put("/book", this.form).then((res) => {
              if (res.code === "0") {
                this.$message({
                  type: "success",
                  message: "更新成功",
                });
              } else {
                this.$message({
                  type: "error",
                  message: res.msg,
                });
              }
              this.load(); // 刷新表格的数据
              this.dialogVisible = false; // 关闭弹窗
            });
          } else {
            // 新增
            request.post("/book", this.form).then((res) => {
              if (res.code === "0") {
                this.$message({
                  type: "success",
                  message: "更新成功",
                });
              } else {
                this.$message({
                  type: "error",
                  message: res.msg,
                });
              }
              this.load(); // 刷新表格的数据
              this.dialogVisible = false; // 关闭弹窗
            });
          }
        }
      });
    },
    handleEdit(row) {
      // 深拷贝
      this.form = JSON.parse(JSON.stringify(row));
      // 用户类型存在 转Number类型 下拉框回显
      if (this.form.userId) {
        this.form.userId = parseInt(this.form.userId);
      }
      this.dialogVisible = true;
      // 查询所有用户
      request.get("/user/findAll").then((res) => {
        this.users = res.data;
      });
    },
    handleDelete(id) {
      request.delete("/book/" + id).then((res) => {
        if (res.code === "0") {
          this.$message({
            type: "success",
            message: "删除成功",
          });
        } else {
          this.$message({
            type: "error",
            message: res.msg,
          });
        }
        this.load(); // 刷新表格数据
      });
    },
    handleSelectionChange(val) {
      this.deleteBatchParams.ids = val.map((v) => v.id); // [{id,name}, {id,name}] => [id,id]
    },
    filesUploadSuccess(res) {
      this.form.cover = res.data;
    },
    buy(bookId) {
      request.get("/order/buy/" + bookId).then((res) => {
        if (res.code === "0") {
          this.payForm = {};
          // 请求成功跳转沙箱支付的页面
          // window.open(res.data)
          // 这里自己写个假界面
          this.payForm = res.data;
          this.payDialogVisible = true;
        } else {
          this.$message.error(res.msg);
        }
      });
    },
    buySuccess() {
      if (this.payForm.totalPrice === 0 || this.payForm.count === 0) {
        this.$message.error("购买数量不能为0");
        return;
      }
      // 确认支付
      request.post("/order/buySuccess/", this.payForm).then((res) => {
        if (res.code === "0") {
          this.$message.success("支付成功~");
          // 触发Layout更新用户信息
          this.$emit("userLocal");
          this.payDialogVisible = false;
          this.load();
        } else {
          this.$message.error(res.msg);
          this.payDialogVisible = false;
          this.load();
        }
      });
    },
    closeDialog() {
      // 清空form元素
      this.form = {};
      if (this.$refs["upload"]) {
        this.$refs["upload"].clearFiles(); // 清除历史文件列表
      }
      this.$refs["form"].resetFields();
    },
    deleteBatch() {
      if (!this.deleteBatchParams.ids.length) {
        this.$message.warning("请选择数据！");
        return;
      }
      request.post("/book/deleteBatch", this.deleteBatchParams).then((res) => {
        if (res.code === "0") {
          this.$message.success("批量删除成功");
          this.load();
        } else {
          this.$message.error(res.msg);
        }
      });
    },
    handleSizeChange(pageSize) {
      // 改变当前每页的个数触发
      this.queryParams.pageSize = pageSize;
      this.load();
    },
    handleCurrentChange(pageNum) {
      // 改变当前页码触发
      this.queryParams.pageNum = pageNum;
      this.load();
    },
    calculateTotalPrice() {
      let count = this.payForm.count;
      let price = this.payForm.book.price;
      this.payForm.totalPrice = count * price;
      this.payForm.payPrice = count * price;
    },
  },
};
</script>

<style scoped>
</style>